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G. D. KING; Machine for Preparing Wood for the Manufacture of PaperPulp.

No. 242,138. Patented May 31, 1.88l. .7

N FITERS, FMIo-lflhomphun Washington, D. c,

2 t e e h 4 8 e e h 8 2 G N I K D G m d 0 .M 0 N Machine for -PrsparingWood for the Manufacture of Paper Pulp.

No.242J 38.

Patented May 3|, I881.

N- PETERS, PhotoLlllwgrlw, Washinlbm D l UNITED STATES PATENT OFFICE.

GEORGE 1). KING, on os-WEeo, NEW YORK.

MACHINE FOR PREPARING WOOD FOR THE MANUFACTURE OF PAPER-PULP.

SPECIFICATION formingpart of Letters Patent No. 242,138, dated May 31,1881.

Application filed July 21, 1880. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE D.KING, a citizen of the United States,residing at Oswego, in the county of Oswego and State of New York, haveinvented new and useful Improvements in Machines for Preparing Wood forits Manufacture into Paper-Pulp, of which the following is aspecification.

My invention relates to machines for cutting wood into small pieces orchipping it preparatory to reducing it to pulp by grinding or bychemical means; and the object thereof is to provide a machine for theabove-named purpose which will reduce the wood rapidly to pieces ofuniform size.

I attain the above-named object by means of the devices and constructionillustrated in the accompanying drawings, in which- Figure 1 is a sideelevation of my machine. Fig. 2 is a perspective view of the front ofthe cutter-wheel. Fig. 3 is a like view of the rear side of said wheeland showing its drivinggear. Fig. 4 is a view of the straiglit edgedcutter, and Fig.5is a view of the toothed-edged cutter. Fig.6 shows theend of a stick of wood as it appears after having been acted upon by thetoothed cutter-knife.

A A are portions of the frame of the machine, upon which are securedboxes b, in which a shaft, 0, runs.

Upon the end of shaft 0, projecting beyond the side of frame A, isfixedthe geared cutterwheelB, which is driven by a gear, D, on the end of ashaft parallel to shaft 0, also running in frame A, and having on it thetight and loose pulleys a a and the balance-wheel c.

E is an inclined fced-trough bed attached to frame A, its lower endterminating near the front face of the cutter-wheel B.

Upon the rear face of the cutter-wheel are cast or otherwise providedtwo inclined cutterblocks, 6 e, and a rectangular openingis made throughwheel 13, as shown, at the base of each of said blocks 6 6'. Upon theupper edge of each of the said blocks areformedproperbases for thereception of two screw-bolts, i i, and two or more bolts, 0 o, are fixedin the face of these blocks at right angles thereto.

The two cutters h h are made of suitable form to adapt them to besecured to wheel B in such a manner that their cutting=edges willproject through openings in said wheel to a uniform distance beyond theface of it, and one of said cutters is slotted from its cutting-edgeinward, forming a series of slots and cutters thereon of equal width,and the second cutter, h, is made with a straight cutting-edge. When inthis position the upper edge of the knives is under the ends of thescrewbolts i i, as seen in Fig. 3.

The movements of the parts of my machine will be readily understood bythe drawings, power being applied by belt upon pulley aand through theshaft upon which it is fixed, and by gear D to the cutter-wheel B,theinner face of which revolves in close proximity to the end of thefeed-trough bed E.

The cutters h h are adapted to have their cutting-edges project throughwheel B, as seen in Fig. 2, standing at an angle to the plane ofrotation of wheel B determined by the incline of the blocks 6 e, andwhile the nuts on bolts 0 are slightly turned back screw-bolts i areforced against the rear edge of the cutters to cause them to projectthrough the openings in wheel B far enough to cut a chip of therequisite and uniform thickness from the end of a block presented to theface of said wheel,and the straight-edged cutter is set to outjust thedepth of the grooves cut by the toothed cutter. Thus the toothed cuttercuts out its series of chips as it passes against the end of the block,grooving it, as shownin Fig. 6, and the straightedged cutter follows,cutting at the same depth, and takes on a like series of chips formed ofthe ribs 00, which are shaved off close to the end of the stick.

The machine having been adjusted and set in motion, blocks of wood arefed downward endwise in any suitable feed-trough located on bed E, and,as will be seen, the direction of the out of the knives is diagonallyacross its grain, as shown in Fig. 5, and the successive action of thetooth ed and straight-edged cutters upon the stick is as just described.It will be readily understood that the said direction of the cutrelative to the grain of the wood will tend to open the grain of thechips so made, and thus facilitate disintegration by grinding and permitchemical solutions to more freely enter the pores of the wood and hastendisintegra tion by this means. The aforesaid successive action of saidcutters produces chips from the stick ofuniform width and thickness,orif they Vary at all they will be simply narrower under certaincircumstances when cut from the edge of the stick, and will not exceedthe width and t thickness determined by the set of the cutters and thespread of the teeth on one of them.

The most economical and successful results in pulping wood are onlyreached when the wood, preparatory to grinding or reduction by chemicalmeans,isreduced to chips of uniform width and thickness. This conditionof the 3 wood adapts it to be ground between abrading-surfaces much moreevenly than when chips of largely-varying dimensions are acted upon atthe same time by the grinding-surfaces; and when wood chips of variousdimensions are submitted to the action of chemical solutions fordisintegrating purposes the tinest chips become pulped long before thelarger 1 ones, and by the time the latter are disintegrated a large partof the pulp from the former ones is destroyed by the prolonged action ofthe caustic liquor necessary to reduce theth iel; l chips. l

3y reducing the wood to uniform width and thickness a caustic liquor ofless strength may be employed and a larger yield of pulp be obtained.

What I claim as my invention is- 1. The combination, in a machine forpreparing wood for the manufacture of paper-pulp, of an inclinedfeed-bed, of a cutter-wheel arranged to revolve at the end of saidfeed-bed in a plane at right angles thereto, and of two i cuttersadjustably secured to said cutter-wheel to successively cut grooves inand shave OH to a uniform depth the surface of a piece of wood forcedagainst said wheel, substantially as and for the purpose set forth.

2. The combination, with the inclined feedbcd I), of the cutter-wheel Band the cutters h and I1, adjnstably secured to said wheel,substantially as and for the purpose set forth.

GEORGE D. KING.

Witnesses:

JoIIN ll. MeCoLLoM, (1. II. Bv'rLnR.

